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  • Protein in the nose...

Protein in the nose provides information about COPD, reports research

Dr. Kamal Kant KohliWritten by Dr. Kamal Kant Kohli Published On 2025-04-09T20:30:30+05:30  |  Updated On 9 April 2025 8:30 PM IST
Protein in the nose provides information about COPD, reports research
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Early diagnosis of COPD, chronic obstructive pulmonary disease, increases the quality of life of the patient and the efficacy of available treatments. Researchers at Karolinska Institutet in Sweden have now shown that material from nasal lavage provides a basis for assessing COPD. The study, which has been published in the Journal of Allergy and Clinical Immunology, could lead to a simple diagnostic method for early assessment of COPD.

Chronic obstructive pulmonary disease (COPD) affects ten percent of the population and is the fourth most common cause of death in the world. The disease is mainly caused by smoke from biomass and the patient group is very heterogeneous in terms of symptoms and prognosis.

This means that the medical needs vary greatly, while today's examination methods are neither sufficient nor useful for assessing the large number of patients. Therefore, simple and safe methods that work at the individual level are needed.

Immune cells in the nose

Researchers at Karolinska Institutet and Karolinska University Hospital have now shown that elevated levels of the protein interleukin-26 (IL-26) in the nose of smokers with and without COPD can be used to assess patients with an early phase of the disease.

IL-26 is a so-called cytokine that is important for cell communication in the immune system. An interesting property of IL-26 is that this cytokine has a direct inhibitory effect on bacteria and viruses.

Cytokines can influence inflammation and immune responses, and IL-26 has previously been linked to various inflammatory diseases, including COPD. In COPD, the levels of IL-26 in the lower respiratory tract have been shown to be elevated.

In the current study, the researchers have focused on understanding how IL-26 is produced in the nose of smokers and what the levels say about the individual COPD patient.

“We have discovered that IL-26 is produced in greater amounts in the nose of smokers with COPD compared to non-smokers, while smokers without COPD showed a tendency towards increased levels. This suggests that IL-26 may be an important factor in the inflammatory process underlying COPD,” says the study's first author Julia Arebro, researcher at the Department of Clinical Science, Intervention and Technology, Karolinska Institutet, and physician at Karolinska University Hospital.

A simple nasal lavage

The study included 50 research participants; active habitual smokers with and without COPD, as well as a control group of healthy non-smokers. Patients with other lung diseases were excluded from the study.

Among other things, the study participants underwent a simple nasal lavage so that the researchers could analyse the presence of IL-26 in the nose. The measured levels were found to reflect inflammation of the lower respiratory tract but also symptoms and other clinical findings in COPD.

“This opens up an easier way to characterise COPD patients without having to examine their lower airways with methods that are resource-intensive and involve medical risks,” says Julia Arebro.

New treatment strategies

The study also shows that T cells, a type of white blood cell in the immune system, are involved in the production of IL-26 in the nose.

“Our results support that IL-26 contributes to the chronic inflammation that is typical for COPD. This may open up for new treatment strategies that target IL-26 to reduce inflammation and improve the quality of life for patients with COPD,” says Anders Lindén, professor at the Institute of Environmental Medicine, Karolinska Institutet, and senior physician at Karolinska University Hospital who has led the research team behind the study.

The study was conducted in patients with mild to moderate COPD. In a next step, the researchers are planning a similar study on COPD, but in later stages. If future work confirms current results, the researchers believe that the method for easily estimating patients with COPD can be implemented within the next few years.

Reference:

Julia Arebro, Nikolaos Pournaras, Patricia Ramos-Ramírez, Nasal production of IL-26 involving T cells in smokers with and without COPD, Journal of Allergy and Clinical Immunology, DOI: https://doi.org/10.1016/j.jaci.2025.03.017.

Journal of Allergy and Clinical ImmunologyCOPDChronic obstructive pulmonary diseaseCytokines
Source : Journal of Allergy and Clinical Immunology
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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